Attachment-plug.



J. G. DALLAM. ATTAGHMENT PLUG.

, APPLICATION FILED 1111.11, 1905.

Witnesses Invento'r:

UNITED STATES PATENT OFFICE. J

JOHN C. DALLAM, 0F SCHENECTADY, NEW YORK ASSIGNOR TO STANLEY ELECTRIC.MANUFACTURING COMPANY, OF PITTSFIELD, MASSACHUSETTS, A CORPORATIQN onNEW JERSEY.

ATTACHMENT-PLUG.

Specification of Letters Patent.

Patented July 19, 1910.

To all whom it may concern:

Be it known that I, JOHN C. DALLAM, .a citizen of the United States,residing at Schenectady, colunty of Schenectady, State of New York, haveinvented certain new and useful Improvements in Attachment-Plugs, ofwhich the following is a specification.

The present invention relates to connectors for electric conductors, andmore particularly to attachment plugs designed for use in connecting thefeed wires of small elec-' trical apparatus such as fan motors, heaters,portable lamps, etc., to a service circluit by the mere insertion of theplug into the socket or receptacle of the ordlnary incandescent lamp. a

The object of the invention is to provide a simple, compact and highlyefficient device of this character which may be readily separated sothat the part carrying the contacts for engagement with the contacts ofthe socket or receptacle may be independently rotated into or out ofoperative position, and the other member to which the feed wires areattached connected thereto without twisting or untwisting of the feedWires and, moreover, to afford an easily severable joint whereby theapplication of tensile strains to the feed wires will merely cause aseparation of the parts and protect the socket or receptacle and itssupport from injury.

In carrying out my invention I provide an insulating base section and aseparable wire engaging section. The former section is provided at oneend with metallic contacts adapted to connect with the contacts of asocket or receptacle and electrically connected to metallic jaws orclips at the opposite end for detachably engaging project-ions on theseparable wire. engaging section. The latter section has an insulating-disk, upon one side of which are mounted the engaging projections, andupon the other side are mounted suitable binding posts andcut-ou'tdevices, and surrounding the edge of the disk, the binding postsand cut-o\ut devices, is a suitable protecting cap.

For a more complete understanding of the invention reference may be madeto the following detailed description and the accompanying drawingforming a part of this specification in which,

Figure 1 is a vertical section of a separable attaching plug embodyingone form of my invention; Fig. 2 is a plan View of the which a rod orscrew 6 extends upwardly I axially of the base.

The upper portion of the base section 1 is provided with two recesses 7and 8. The larger recess Z extending from near the periphery to theopposite side of the axis receives an angular clip or jaw 9 having itstransversely-disposed arm 10 apertured and threaded for engagement withthe upper end of the axial screw 6, while the longitudinal arm 11 isprovided with a reverse curve to afiord a grip for a corresponding parton the separable section. The smaller recess 8 is separated from thelarger recess 7 by a septum 12, and at the bottom thereof is an aperture'13 through which extends a straight shanked spring clip or jaw 14 whichis connected at its lower end to the lower 4 edge of the screw shell bysolder or othersuitable means. The upper end 15 of the clip or jaw 14 isprovidedwith a reverse curve siinilar to that in clip or jaw 9, but

oppositely disposed. The screw shell 4 and the clip or jaw 14 carriedthereby are held in position on the base by a screw 16 extendinglongitudinally through the upper base portion and engaging a suitablelug (not shown) on the upper edge of the screw shell.

The separable section 17 has an insulating disk 18 of-fiber or othertough insulating material with metallic projections or fingers 19secured to the lower surface thereof for" The disk 18 is provided near.its periphery with a fifth screw 24 which serves as a binding screw forone of the feed wires 25 and an end of a fuse 26. The opposite end ofthe fuse maybe connected to either of the binding screws 23 or 23, Whilethe second feed wire 25 is connected to the other.

The protecting cap 27 is of sheet vmetal made hemispherlcal in shapesimilar to the caps of the .ordinary lamp sockets, ,and is connected tothe insulating disk 18 by radial screws28 extending through the lowersides of the cap 27 and engaging tapped holes in 1 the disk. By securingthedisk 18 slightly or jaws.

above the lower edge of the cap, as shown in Fig. 1, the latter isadapted to serve as a guard flange 29 for the joint between the twosections of the plug.

I do not desire to restrict myself to the particular form ofconstruction of parts herein described and shown, since it is apparentthat they may be changed and modified without departing from myinvention.

What I claim asnew and desire to secure by Letters Patent of-the UnitedStates, is,-

1. A separable electric connector comprising'a one-piece base ofinsulating material provided at one end with recesses, contact clips' orjaws located in said recesses, and center and side contacts at the otherend of the base electrically connected to said clips 2. A separableelectric comiector comprising a one-piece base of insulating materialprovided at one end with recesses, contact clips or'jaws located in saidrecesses, a shell contact surrounding the other end of said base andconnected to one of said clips or jaws, and a center contact connectedto the other clip or jaw.

3. A separable electric connector compris ing a one-piece base ofinsulating material provided in the upper end with recesses, contactclips or jaws located in said recesses with their outer ends below theend surface of the base, a shell contact mounted upon andsurrounding thelower end of said base and connected to o of said clips or jaws, and acenter contact electrically connected to the other clip or jaw. i

[4. A separable attaching plug comprising an insulating base part havingintegral cylindrical end portions of different diameters,

metal contacts mounted on the smaller end portion, recesses formed inthe opposite end,

an angular jaw of flat metal arranged in one of said recesses andconnected to one of the end, one of which is connected to thesidecontact, a conductor extending from the center contact axially throughthe base, and a radial connector attached thereto and connected to thesecond cont-act clip.

In witness whereof, I have hereunto set my hand this 9th day of January,1905.

JOHN C. DALLAM.

Witnesses BENJAMIN B. HULL, HELEN ORroRD'.

